x86/sev-es: Do not unroll string I/O for SEV-ES guests

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Under the GHCB specification, SEV-ES guests can support string I/O.
The current #VC handler contains this support, so remove the need to
unroll kernel string I/O operations. This will reduce the number of #VC
exceptions generated as well as the number VM exits for the guest.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/3de04b5b638546ac75d42ba52307fe1a922173d3.1612203987.git.thomas.lendacky@amd.com

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Tom Lendacky 2021-02-01 12:26:27 -06:00 • committed by Borislav Petkov

parent 1048ba83fb

commit 62a08a7193

1 changed files with 3 additions and 2 deletions

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arch/x86/mm/mem_encrypt.c

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